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IIT JEE 2006 Paper : CHEMISTRY Section II - Multiple Answers

Each question has one or more than one correct choice among (a), (b), (c) and (d). Write down all the correct choices in alphabetical order without any spaces in between.
For example, if the correct choices are (a), (b) and (d) then simply write in the input box provided:
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An aqueous solution of H2CO3 contains

(a) H2CO3
(b) HCO3
(c) CO2 2−
(d) CO2


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